Add iOS platform service boundaries

apps/ios/TeleTuiIOS/Sources/TeleTuiIOSCore/ViewModels.swift

@@ -264,8 +264,15 @@ public final class ProfileViewModel: ObservableObject {
 public final class MediaViewModel: ObservableObject {
     @Published public private(set) var activePhotoPath: String?
     @Published public private(set) var activeVoicePath: String?
+    @Published public private(set) var isVoicePlaying = false
 
-    public init() {}
+    private let cache: MediaCache?
+    private let voicePlayer: VoicePlayback?
+
+    public init(cache: MediaCache? = nil, voicePlayer: VoicePlayback? = nil) {
+        self.cache = cache
+        self.voicePlayer = voicePlayer
+    }
 
     public func showPhoto(path: String) {
         activePhotoPath = path
@@ -274,4 +281,27 @@ public final class MediaViewModel: ObservableObject {
     public func showVoice(path: String) {
         activeVoicePath = path
     }
+
+    public func cachedPhotoPath(fileId: Int32) -> URL? {
+        cache?.photoPath(fileId: fileId)
+    }
+
+    public func cachedVoicePath(fileId: Int32) -> URL? {
+        cache?.voicePath(fileId: fileId)
+    }
+
+    public func playVoice(url: URL) async {
+        do {
+            try await voicePlayer?.load(url: url)
+            await voicePlayer?.play()
+            isVoicePlaying = true
+        } catch {
+            isVoicePlaying = false
+        }
+    }
+
+    public func pauseVoice() async {
+        await voicePlayer?.pause()
+        isVoicePlaying = false
+    }
 }